EP2988049B1 - Procédé de raccordement de petits tubes métalliques - Google Patents

Procédé de raccordement de petits tubes métalliques Download PDF

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Publication number
EP2988049B1
EP2988049B1 EP15184840.5A EP15184840A EP2988049B1 EP 2988049 B1 EP2988049 B1 EP 2988049B1 EP 15184840 A EP15184840 A EP 15184840A EP 2988049 B1 EP2988049 B1 EP 2988049B1
Authority
EP
European Patent Office
Prior art keywords
plastic tube
plastic
connecting piece
tube
piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15184840.5A
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German (de)
English (en)
Other versions
EP2988049A1 (fr
Inventor
Michael Schwager
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sis Medical AG
Original Assignee
Sis Medical AG
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Filing date
Publication date
Application filed by Sis Medical AG filed Critical Sis Medical AG
Publication of EP2988049A1 publication Critical patent/EP2988049A1/fr
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Publication of EP2988049B1 publication Critical patent/EP2988049B1/fr
Active legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L31/00—Arrangements for connecting hoses to one another or to flexible sleeves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L24/00—Surgical adhesives or cements; Adhesives for colostomy devices
    • A61L24/04—Surgical adhesives or cements; Adhesives for colostomy devices containing macromolecular materials
    • A61L24/046—Surgical adhesives or cements; Adhesives for colostomy devices containing macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L26/00—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form
    • A61L26/0009—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form containing macromolecular materials
    • A61L26/0019—Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form containing macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/14—Macromolecular materials
    • A61L27/18—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
    • A61L29/04—Macromolecular materials
    • A61L29/06—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/04—Macromolecular materials
    • A61L31/06—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0009—Making of catheters or other medical or surgical tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10—Tube connectors; Tube couplings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
    • B29C65/68—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined using auxiliary shrinkable elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/303—Particular design of joint configurations the joint involving an anchoring effect
    • B29C66/3034—Particular design of joint configurations the joint involving an anchoring effect making use of additional elements, e.g. meshes
    • B29C66/30341—Particular design of joint configurations the joint involving an anchoring effect making use of additional elements, e.g. meshes non-integral with the parts to be joined, e.g. making use of extra elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63—Internally supporting the article during joining
    • B29C66/636—Internally supporting the article during joining using a support which remains in the joined object
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/005—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics the first pipe being joined to the ends of two other pipes placed one inside the other, e.g. gas pipe with protective sheath
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0009—Making of catheters or other medical or surgical tubes
    • A61M25/0014—Connecting a tube to a hub
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M25/1027—Making of balloon catheters
    • A61M25/1029—Production methods of the balloon members, e.g. blow-moulding, extruding, deposition or by wrapping a plurality of layers of balloon material around a mandril
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/10—Balloon catheters
    • A61M25/1027—Making of balloon catheters
    • A61M25/1036—Making parts for balloon catheter systems, e.g. shafts or distal ends
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10—Tube connectors; Tube couplings
    • A61M39/14—Tube connectors; Tube couplings for connecting tubes having sealed ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/02—Belling or enlarging, e.g. combined with forming a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B29C66/712—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined the composition of one of the parts to be joined being different from the composition of the other part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/735—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the extensive physical properties of the parts to be joined
    • B29C66/7352—Thickness, e.g. very thin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • B29K2705/08—Transition metals
    • B29K2705/12—Iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/753—Medical equipment; Accessories therefor
    • B29L2031/7542—Catheters

Definitions

  • the invention relates to a method for coaxially connecting a first plastic tube to a second plastic tube, which plastic tubes are provided in particular as components of a medical catheter, wherein the two plastic tubes are connected via a tubular connecting piece. Furthermore, the invention relates to a use of the method in the manufacture of a catheter and to an arrangement of two interconnected plastic tubes.
  • the tip region of the catheter is generally formed from a relatively flexible plastic tube, while the underlying portions of the catheter are made from stiffer plastic tubing.
  • plastic tubes are usually glued together and / or welded together.
  • the object of the invention is therefore to provide a process associated with the aforementioned technical field, which is more flexible and allows a simple and secure connection of plastic tubes, especially in the manufacture of medical catheters.
  • the first plastic tube and / or the second plastic tube are formed in a forming process from the outside to the tubular connecting piece, so that an adhesive and / or positive connection is formed.
  • a plastic tube is understood in this context to mean a thin tube made of a plastic, which preferably has a diameter of at most 3 mm, particularly preferably a diameter of at most 2 mm, and particularly preferably a diameter of at most 1 mm.
  • a wall thickness of the plastic tube measures in particular at most 0.5 mm, more preferably at most 0.2 mm, and most preferably at most 0.1 mm.
  • the term forming process in this context refers to a process in which a body, for. As a plastic tube, selectively plastically deformed and is brought into a new shape, wherein the volume and the mass of the reshaped body obtained obese.
  • At least one of the two plastic tubes to be connected is connected to the tubular connecting piece by the shaping process according to the invention. It is well within the scope of the invention that the other plastic tube, if appropriate, by another connection technique, eg. B. by material connection, is connected to the tubular connector. Also possible is the use of a first plastic tube, which already has at one end via a tubular connecting piece or the formation of a tubular connecting piece in an end region of the first plastic tube.
  • the forming process takes place an actual plastic deformation of the first and / or the second plastic tube.
  • the interface layers of the inner portions of the first and / or the second plastic tube are brought into direct contact with the interface layer of the outer portion of the tubular connector. Since during the forming process, the plastic tubes are formed on the tubular connector or on its outer contour, the contact surfaces of the interface layers of the plastic tube and the interface layers of the tubular connector are maximized. Thereby, an adhesive connection or a mechanical cohesion between the plastic tube and the tubular connecting piece is obtained, which in particular is based on microscopic clamping and / or atomic and / or molecular interactions between the interfacial layers of the plastic tube and the tubular connecting piece.
  • Such adhesive compounds are in particular also fluid-tight, thus insisting on a seal of the compound by additional sealing compounds, for.
  • adhesives can be dispensed with. This is particularly advantageous for medical catheters.
  • a form-fitting connection can also be formed on a macroscopic scale during the forming process, which increases the mechanical stability of the connection between the plastic tube and the tubular connecting piece, in particular in addition to the adhesive compound.
  • the inventive forming process can be adhesive-free and mechanically stable connections between the plastic tube and the tubular connector to form. This is particularly advantageous in the case of plastic tubes which have a diameter of at most 3 mm. So z. B. the uniform and precise attachment of adhesive in such a thin plastic tube in practice relatively complex. In addition, there is a risk that when applying the adhesive accidentally gets into the interior of the plastic tube. The removal of the unwanted introduced into the plastic tube adhesive is then correspondingly difficult and troublesome. Accordingly, welding operations on such thin must Plastic tubes are carried out very precisely, among other things, due to the small wall thicknesses, so that the plastic tubes are not damaged. In addition, the welding of plastic makes certain demands on the materials used, since not all plastics can be welded together. The welding of plastic with other materials, such. As metal, is also not possible, which limits the choice of material for the tubular connector, which does not necessarily have to consist of a plastic.
  • the tubular connecting element can be completely enveloped or surrounded by the plastic tubes.
  • any edges and / or boards of the tubular connector are covered by the plastic tube.
  • Edge portions of the plastic tube itself can z. B. during the forming process according to the invention in particular rounded and / or wedge-shaped expiring formed. This can be z.
  • catheters of great advantage since they must be guided by sensitive and sometimes narrow hollow organs of the human and / or animal body. Boards or edges at the junction would damage or injure the hollow organs.
  • the inventive method in particular over the welding and / or bonding of plastic tubes, offers significant advantages and is also flexible in different materials. Since the inventive method is particularly advantageous for very thin plastic tubes, it is particularly suitable for the production of medical catheters.
  • the first plastic tube and / or the second plastic tube are softened during the forming process by a heat treatment and formed by a pressing force acting in a radial direction to the tubular connecting piece.
  • a heat treatment the boundary layer of the first and / or the second plastic tube is softened, whereby the Anformung to the tubular Connector simplified.
  • the pressing force which acts in particular during the heat treatment on the first and / or the second plastic tube, this can best be molded to the outer contour of the tubular connector, since the plastic tube is in this case in a softened state. This forms the greatest possible adhesion between the plastic tube and the tubular connecting piece.
  • the pressing force acts with advantage in all radial directions on the plastic tube, so that the plastic tube is pressed uniformly from all directions to the tubular connector.
  • a shrink tube which z. B. consists of a plastic such as polyolefins, polyvinyl chloride or Teflon.
  • the shrink tube can be pushed directly over the areas of the plastic tube, which are to be formed in the forming process to the tubular connector.
  • the heat-shrinkable tube can be heated so that it contracts sharply in the radial direction and a pressing force acts on the plastic tubes. Due to the supplied heat, the plastic tubes can be softened and / or melted simultaneously.
  • the shrink tube can be removed after the forming process or left on the connected plastic tube. In the latter case, the shrink tube can serve as additional stabilization and / or protection from the joint.
  • an end portion of the first plastic tube is coaxially pushed over a first end of the tubular connector and an end portion of the second plastic tube coaxially via pushed second end of the tubular connector.
  • the tubular connecting piece is z. B. as a separate hollow cylinder or as a short piece of pipe before.
  • first plastic tube which is equipped with a further and protruding from the first plastic tube inner tube
  • second plastic tube in particular an inner diameter which is at least equal to the outer diameter of the inner tube of the first plastic tube.
  • the tubular connector may in this case be slipped onto the inner tube and subsequently the first end of the tubular connector inserted into the end portion of the first plastic tube. Thereafter, the second plastic tube may be slipped first over the inner tube protruding from the first plastic tube and then over the second end of the tubular connector.
  • a modulus of elasticity of the tubular connecting piece is greater than a modulus of elasticity of the first plastic tube and greater than a modulus of elasticity of the second plastic tube.
  • Such an arrangement is more stable against tensile loads in particular. Under tensile load, the plastic tubes have the tendency to pull together in diameter. This creates a force in the radial direction which acts on the tubular connector. The greater the modulus of elasticity of the tubular connecting piece, the better this can counteract the force acting in the radial direction, without itself being greatly deformed. This is under tensile load between the plastic tube and the tubular connecting piece additionally generates a frictional connection, which increases the mechanical strength of the connection.
  • tubular connecting piece with a lower modulus of elasticity. This may be advantageous in some cases to increase the flexibility of the joint. However, in this case eliminates the advantage of additional frictional connection between tubular connector and plastic tube.
  • the first plastic tube used consists of a first thermoplastic material, for example of polyethylene terephthalate, and the second plastic tube of a second thermoplastic material, for example of nylon.
  • first thermoplastic material for example of polyethylene terephthalate
  • second thermoplastic material for example of nylon.
  • thermoplastic materials can be easily softened or melted by heat treatment and reshaped in a softened state. Since the softening or melting of the thermoplastic material is reversible, the material properties of the plastic tubes are not changed and / or impaired by the forming process.
  • plastic tubes of such thermoplastic materials are particularly suitable for medical catheters.
  • a plastic tube made of polyethylene terephthalate can be arranged as a catheter shaft and a plastic tube made of nylon in the region of the catheter tip. Since polyethyleneetherephtalate plastic tubes of the same dimensions are generally stiffer than nylon plastic tubes, catheters thus formed can be easily inserted into hollow organs.
  • plastic tubes made of other formable plastics.
  • the end portion of the first plastic tube is formed in this case during the forming process at least partially to the end portion of the second plastic tube. This can be prevented in particular that a gap is formed between the two plastic tubes to be connected, whereby the tightness of the connection between the two plastic tubes is improved. But it is also possible to push the two plastic tubes to be joined together at the end. Although the connection between the two plastic tubes may then be less dense, there is the advantage that the diameter of the connection point is thinner overall.
  • a modulus of elasticity of the first plastic tube is preferably greater than a modulus of elasticity of the second plastic tube. This improves in particular the mechanical strength of the direct connection between the two plastic tubes. Since the first plastic tube, which is arranged within the end region of the second plastic tube, contracts less strongly under tensile load than the second plastic tube lying above it, a non-positive connection is additionally produced under tensile load directly between the first plastic tube and the second plastic tube.
  • the tubular connector used is polyimide.
  • Polyimide as a material for the tubular connector has been found to be advantageous because polyimide has a relatively large modulus of elasticity and is thus difficult to deform. At the same time, however, there is a certain flexibility, which is desirable in particular in the connection of flexible plastic tubes. Furthermore, the shrinkage of polyimide under heat in the temperature range of interest here is extremely low. A tubular connecting piece and polyimide therefore remains extremely dimensionally stable even at the temperatures prevailing during the forming process.
  • a wall of the tubular connector is reinforced with an embedded wire helix.
  • the wall of the tubular connector which z. B. consists of a thermoplastic material, are formed on the embedded wire helix.
  • a helical structure is formed on the outside of the tubular connector.
  • the first and / or the second plastic tube are in this case formed during the forming process to the helical structure, whereby a positive connection between the plastic tube and the tubular connector is formed. This improves the mechanical strength of the connection or the arrangement of the plastic tube and the tubular connector.
  • the tubular connecting piece has a structured outer lateral surface.
  • the structured outer lateral surface may comprise, for example, vanes and / or grooves and / or screw threads and / or circumferential flanges. Since the plastic tubes are formed during the forming process to the structured outer surface of the tubular connector, a positive connection between the plastic tube and tubular connector is formed, which improves the mechanical strength.
  • tubular connectors without structured outer sides or lateral surfaces.
  • the mechanical strength of the connection with respect to a structured outer surface area is reduced.
  • a helical spring is used as a tubular connecting piece, wherein the helical spring consists in particular of metallic wire.
  • Coil springs as tubular connecting pieces have proven to be advantageous, since they have a relatively high bending flexibility with respect to the longitudinal axis, but at the same time are only slightly flexible in the radial direction.
  • coil springs have a structured outer circumferential surface due to the wire windings arranged side by side. Since the coil spring in the radial direction only is not very flexible, the plastic tubes can be in the forming process well on the coil springs or the individual turns of wire. As a result, a positive connection between the coil spring and plastic tube can be produced in a simple manner.
  • Such made of plastic tube assemblies, which are connected by a coil spring are characterized by a high mechanical strength, but are still relatively flexible with respect to a longitudinal direction.
  • individual turns of the coil spring at a distance corresponding to 10 - 50% of a wire diameter of the coil spring.
  • An arrangement of plastic tubes, which are connected by a coil spring with such spaced apart individual turns, is characterized in particular by optimum flexibility in the region of the connection point. In particular, the bending flexibility of the connection point with respect to a longitudinal axis is thus optimized.
  • both the first plastic tube and the second plastic tube are preferred positively integrally formed on the tubular connecting piece. This creates an optimum connection with respect to mechanical strength.
  • the non-positively connected plastic tube can be adhesively secured, for example. It is also within the scope of the invention to connect both plastic tubes without positive locking, for example adhesiv with the tubular connecting piece.
  • the first end region of the first plastic tube is formed into a connection piece before the forming process.
  • the tubular connecting piece consists in this case of an end portion of the first plastic tube which has been shaped into a connecting piece, wherein the connecting piece preferably has a substantially smaller outer diameter than the first plastic tube.
  • the connection piece takes over the function of the tubular connecting piece in this case. This can be dispensed with a separate tubular connector. As mentioned above, however, the tubular connecting piece can also be present as a separate part.
  • a modulus of elasticity of the first plastic tube is preferably greater than a modulus of elasticity of the second plastic tube. Since the connection piece is formed in this case from the first plastic tube, the connection piece has a modulus of elasticity which is greater than the elastic modulus of the second plastic tube. Thus, a higher mechanical strength of the connection between the connecting piece and the second plastic tube is obtained. Under tensile load, the second and outer plastic tube contracts and presses in the radial direction on the connection piece. Due to the higher modulus of elasticity of the connecting piece, it contracts less than the second plastic tube. This results overall in an additional frictional connection between the second plastic tube and the connecting piece.
  • the second plastic tube may have a higher modulus of elasticity than the first plastic tube.
  • the connecting piece from the second plastic tube slides out, as the connection piece under tensile load in this case contracts more than the second plastic tube.
  • an outer diameter of the connecting piece is designed to be substantially tapered compared with the outer diameter of the first plastic tube. This makes it easier to push the second plastic tube over the connection piece afterwards. Furthermore, the outer diameter of the connection point can thus be minimized, which is particularly advantageous in the case of medical catheters.
  • an end portion of a cylindrical piece of wire is preferably inserted into the first end portion of the first plastic tube and then the first end portion of the first plastic tube formed by forming from the outside to the end portion of the cylindrical wire piece.
  • An outer diameter of the end portion of the cylindrical piece of wire measures in particular 60-80%, more preferably 65-75%, of the inner diameter of the first plastic tube before the formation of the connecting piece.
  • connecting pieces produced in this way have stabilities which are comparable with the stability of the plastic tubes as such.
  • the connecting piece has sufficient permeability and at the same time a significant taper in comparison with the plastic tube before the formation of the connecting piece is achieved.
  • the second plastic tube is coaxially pushed over the latter and at least over an entire length of the connecting piece before the forming process. This ensures that during the subsequent forming process, a maximum contact surface between the connection piece and the second plastic tube is formed, whereby, as already mentioned above, the adhesive connection or mechanical cohesion is optimized.
  • connection piece has a larger outer diameter than the first plastic tube, since then during the forming process in addition a positive connection can be produced.
  • a free end of the connecting piece is widened before the forming process.
  • the free end is formed widened compared to the other areas of the connecting piece, in the subsequent forming process can produce a positive connection, which improves in particular the mechanical cohesion between the connection piece and the second plastic tube.
  • a thickened region of the cylindrical wire piece adjoining the end portion of the cylindrical wire piece and / or a widened transition region to the thickened portion are advantageously pushed in a direction toward the first plastic tube into the free end of the connecting piece.
  • the transition between the end portion of the cylindrical wire piece and the thickened portion of the cylindrical wire piece is in particular conical and / or rounded, so that the thickened portion of the cylindrical piece of wire are best pushed into the free end of the connecting piece.
  • an outer diameter of the thickened portion of the cylindrical wire piece substantially corresponds to the inner diameter of the first plastic tube prior to the production of the connecting piece. It has been found that such a dimensioned piece of wire is particularly suitable in order to achieve sufficient for a positive connection expansion of the connecting piece, without damaging the connecting piece during the expansion.
  • the second plastic tube is formed integrally with the formation of a positive connection at the end-expanded connecting piece.
  • a positive connection at the end-expanded connecting piece is obtained.
  • the end portion of the cylindrical piece of wire in the connection piece and the widened transition region of the cylindrical piece of wire and / or the thickened portion of the cylindrical piece of wire remain in the widened free end of the connection piece.
  • This can be a given Permeability of the joint can be guaranteed because the connection piece during the forming process, even when using a pressing force and under the influence of heat can not taper further.
  • the plastic tubes are provided for example for fluid conduction and / or as a guide channel for a wire in a catheter.
  • the second plastic tube can be optimally molded to the connection piece, since the connection piece is supported on the inside.
  • the thickened region of the cylindrical piece of wire in the widened end of the connection piece guarantees, in particular, that the widened area does not rejuvenate during the forming process.
  • connection piece is expanded at a free end in particular after the forming process and the second plastic tube is positively formed on the connecting piece.
  • first plastic tube and / or the second plastic tube are spirally wound after the forming process and formed with the application of heat to form a dimensionally stable spiral.
  • the first plastic tube and / or the second plastic tube is therefore present after the application of heat in the form of a dimensionally stable spiral.
  • This allows longer plastic tubes to save space, for example in a packaging wrapper, pack and store. Since the wound coil is dimensionally stable after the application of heat, it retains its spiral shape even after removal of the packaging wrapper. An uncontrolled rolling apart of the plastic tube is thus effectively prevented. But it is also possible to dispense with a spiral winding and / or the formation of a dimensionally stable spiral.
  • the inventive method can therefore be made arrangements comprising a first plastic tube, which is connected via a tubular connecting piece with a second plastic tube, wherein the first plastic tube and / or the second plastic tube is formed from the outside to the tubular connecting piece and adhesively and / or positively connected to the connecting piece.
  • Such arrangements can be formed in particular by the inventive method with small outside diameters.
  • inventive arrangements and the inventive method are particularly suitable for use in the manufacture of medical catheters.
  • FIG. 1a-1c various intermediate stages are shown, which are run through when carrying out a first method according to the invention.
  • Fig. 1d shows a first producible by the inventive method arrangement 1.
  • a first plastic tube 10 shown in longitudinal section.
  • the first plastic tube 10 is cylindrical and has an inner diameter 13 of, for example, 0.7 mm at a wall thickness 14 of z. B. 0.1 mm and consists of polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • the outer diameter 31 of the inner tube 30 corresponds approximately to the inner diameter 13 of the first Kunststoffrschreibchens 10th
  • a cylindrical polyimide tube 50 as a tubular connecting piece.
  • the inner diameter of the polyimide tube 50 corresponds approximately to the inner diameter 13 of the first plastic tube 10.
  • a first flange 51.1 protrudes from the outer lateral surface of the first plastic tube 10.
  • the first flange 51.1 has a semi-circular cross-section and completely circumscribes the polyimide tube 50, which is shown in FIG Fig. 1a however, is not visible.
  • a second flange 52.1 protrudes from the outer lateral surface of the polyimide tube 50.
  • the second flange 52.1 like the first flange 51.1, has a semicircular cross-section and completely circumscribes the polyimide tube 50, which is shown in FIG Fig. 1a also not visible.
  • Fig. 1b shows the situation after the first end 51 of the polyimide tube 50 has been inserted into the first plastic tube 10 and a second plastic tube 20 has been pushed onto the second end 52 of the polyimide tube 50.
  • the first end 51 of the polyimide tube 50 is present in the end region 11 of the first plastic tube 10.
  • the end portion 11 of the first plastic tube 10 thus completely surrounds the first end of the polyimide tube 50.
  • the end region 11 of the first plastic tube 10 projects beyond the first flange 51.1 of the polyimide tube 50. Because of the inserted polyimide tube 50, the end region 11 of the first plastic tube 10 is slightly widened in the radial direction.
  • a second plastic tube 20 is pushed over the second end 52 of the polyimide tube 50.
  • the second plastic tube 20 protrudes coaxially in the longitudinal direction over the second flange 52 of the Polyimidrschreibchens 50.
  • the second plastic tube 20 is also cylindrical, z. B. made of nylon and has an inner diameter 23 of, for example, 0.7 mm at a wall thickness 24 of z. B. 0.1 mm.
  • the end portion 21 of the second plastic tube 20 is also slightly expanded due to the inserted Polyimidrschreibchens 50 in the radial direction. Accordingly, the first plastic tube 10 and the second plastic tube 20 have the same dimensions with respect to their diameters 13, 23 and wall thicknesses 14, 24 and are located coaxially with their end faces.
  • An elastic modulus of the polyimide tube 50 is greater than a modulus of elasticity of the first plastic tube 10, while a modulus of elasticity of the second plastic tube 20 is smaller than the modulus of elasticity of the first plastic tube 10.
  • Fig. 1c shows the situation after the end portion 11 of the first plastic tube 10 has been pushed over the end portion 21 of the second plastic tube 20 in the longitudinal direction.
  • the first plastic tube 10 projects longitudinally beyond the second end 52 of the polyimide tube 50 and beyond the widened end region 21 of the second plastic tube 20.
  • the end region 11 of the first plastic tube 10 therefore completely surrounds the end region 21 of the second plastic tube 20 and is partially additionally widened in the overlap region in the radial direction.
  • a rear region 12 of the first plastic tube 10 which adjoins the end region 11 also surrounds the region of the polyimide tube 50 which is not surrounded by the second plastic tube 20.
  • a shrink tube 40 is loosely arranged around the end portion 11 and the rear portion 12 of the first plastic tube 10.
  • the shrink tube 40 completely surrounds the flared regions of the two plastic tubes 10, 20.
  • Fig. 1d is a first inventive arrangement 1 of the two plastic tubes 10, 20 and the polyimide tube 50 after the conversion process shown.
  • the in Fig. 1c illustrated shrink tube 40 was removed after the forming process again.
  • the end portion 21 of the second plastic tube 20 is formed on the region of the second end 52 of the Polyimidrschreibchens 50 and adhesively connected thereto. Since the end portion 21 of the second plastic tube 20 is also formed on the second flange 52.1, there is also a positive connection between the end portion 21 of the second plastic tube 20 and the polyimide tube 50.
  • the end portion 11 of the first plastic tube 10 is formed from the outside to the end portion 21 of the second plastic tube 20 and adhesively connected thereto.
  • the rear portion 12 of the first plastic tube 10 is formed on the first end 51 of the Polyimidrschreibchens 50 and thus also on the first flange 51.1, whereby an adhesive and positive connection between the first plastic tube 10 and polyimide tube 50 is present.
  • FIG. 2a - 2d Various intermediate stages are shown, which are run through when carrying out a second inventive method.
  • Fig. 2e is a second producible by the inventive method 2 arrangement shown.
  • FIG. 2a On the left side, an end region 111 of a first cylindrical plastic tube 110 is shown in longitudinal section.
  • the first plastic tube 110 has an inner diameter 113 of, for example, 0.7 mm at a wall thickness 114 of z. B. 0.1 mm and consists of polyethylene terephthalate (PET).
  • An outer portion 181.1 of the end portion 181 of the cylindrical wire piece 180 measures approximately 0.5 mm, which corresponds to approximately 71% of the inner diameter 113 of the first plastic tube 110.
  • the cylindrical piece of wire merges into a conically widening transition region 182, which in turn is followed by a thickened region 183 of the cylindrical wire piece 180.
  • the outer diameter 183.1 of the thickened portion of the cylindrical Wire piece 180 measures approximately 0.7 mm and thus substantially corresponds to the inner diameter 113 of the first plastic tube 110.
  • Fig. 2b shows the situation after the end portion 111 of the first plastic tube 110 has been formed on the end portion 181 of the cylindrical wire piece 180 and thereby converted into a connection piece 111.1.
  • the inner diameter of the connecting piece 111.1 thus corresponds to the outer diameter of the end portion 181 of the cylindrical wire piece 180 and has a tapered outer diameter and a tapered inner diameter compared to the remaining portions of the first plastic tube 110.
  • Fig. 2c shows the situation after a second plastic tube 120 has been coaxially pushed over the thickened portion 183 of the cylindrical wire piece 180 and the connecting piece 111.1 of the first plastic tube 110.
  • the second plastic tube 120 is also cylindrical, consists for. B. of nylon and has an inner diameter 123 of, for example, 0.7 mm at a wall thickness 124 of z. B. 0.1 mm.
  • An end region 121 of the second plastic tube protrudes in the longitudinal direction beyond the connection piece 111.1 of the first plastic tube 110 and lies behind the connection piece 111.1 on a non-tapered region of the first plastic tube 110.
  • the end region 121 of the first plastic tube 120 is slightly widened in the radial direction.
  • An elastic modulus of the second plastic tube 120 is smaller than a modulus of elasticity of the first plastic tube 110.
  • Fig. 2d shows the situation after the cylindrical wire piece 180 has been partially pushed in the longitudinal direction in the deformed end portion 111.1 of the first plastic tube 110 inside.
  • the conical transition region 182 of the cylindrical wire piece 180 is present in a region of a free end 111.2 of the connecting piece 111.1.
  • the free end 111.2 of the connection piece 111.1 is substantially conically widened and pressed against the surrounding second plastic tube 120 from the inside.
  • the second plastic tube 120 In the region of the widened free end 111.2 of the first plastic tube 110, which is surrounded by the second plastic tube 120, the second plastic tube 120 has a bulged region 122 into which the widened end 111.2 of the first plastic tube 110 engages.
  • a shrink tube 140 is loosely arranged, which completely surrounds an overlap region of the two plastic tubes.
  • Fig. 2e is a second inventive arrangement 101 from the two plastic tubes 110, 120 shown after the forming process.
  • the end region of the second plastic tube 120 is now in the form of a deformed end region 121.1, which is formed on the first plastic tube 110 in a front region from the outside to the connection piece 111.1 of the first plastic tube 110 and behind the connection piece 111.1. Further behind, the second plastic tube 120 has a reshaped bulged region 122. 1, which is formed from the outside on the widened and deformed free end 111. 3 of the first plastic tube 110.
  • connection piece 111.1 of the first plastic tube 110 and the second plastic tube before an adhesive and at the same time form-fitting connection, which withstands high tensile loads.
  • the second arrangement 102 is z. B. part of a medical catheter 102, which in Fig. 4 is shown.
  • Fig. 3 shows a third inventive arrangement 201, which was prepared substantially like the first arrangement 1 and z. B. is part of a medical catheter.
  • a helical spring 250 was designed as a tubular one Connector used to connect a first plastic tube 210 and a second plastic tube 220.
  • the coil spring 250 consists for example of stainless steel wire with a wire diameter 254 of z. B. 0.1 mm.
  • the inner diameter of the coil spring is constant over an entire length and measures, for example, about 0.7 mm, while the individual turns of the coil spring 250 a distance 253 of z. B. 0.03 mm. Overall, the coil spring 250 has ten turns.
  • the first plastic tube 210 is cylindrical and has an inner diameter of, for example, 0.7 mm with a wall thickness of z. B. 0.1 mm and consists of polyethylene terephthalate (PET).
  • the second plastic tube 20 is also cylindrical, consists for. Made of nylon and has an inner diameter 23 of, for example, 0.7 mm at a wall thickness 24 of e.g. 0.1 mm.
  • An elastic modulus of the second plastic tube 220 is smaller than a modulus of elasticity of the first plastic tube 210.
  • a rear region 212 of the first plastic tube lying behind an end region 211 of the first plastic tube 210 is coaxially formed externally on a region of the first end 251 of the helical spring 250 or on six first turns of the helical spring 250.
  • An end portion 221 of the second plastic tube 220 is also coaxially formed externally with a portion of the second end 252 of the coil spring 250 and with the four remaining turns of the coil spring 250, respectively. Due to the Anformung the coil spring 250 is partially embedded in both the first plastic tube 210 and the second plastic tube 220, wherein the coil spring 250 is approximately to a depth of half the wire diameter 254 of the coil spring 250 in the two plastic tubes 210, 220 embedded. Thus, between the two plastic tubes 210, 220 and the coil spring 250 both an adhesive, as well as a positive connection.
  • the end portion 211 of the first plastic tube 210 which connects stepwise to the rear portion 212 of the first plastic tube, is also molded from the outside to the end portion 221 of the second plastic tube 220 and adhesively connected thereto.
  • the helical spring 250 guarantees, in particular with respect to a longitudinal direction of the third arrangement 201 according to the invention, a high bending flexibility, but at the same time a high tensile strength of the third arrangement 201 is given.
  • the third arrangement 102 is therefore particularly suitable in the region of the foremost 30 cm of a catheter, since this area of the catheter must have a high bending flexibility.
  • Fig. 4 shows a medical catheter 102, which the second assembly 101 from Fig. 2e includes.
  • the two connected plastic tubes 110, 120 which are the in Fig. 2e form a second arrangement 102 shown in detail, are in the form of a deformed and dimensionally stable spiral, which was formed by a preliminary heat treatment at 50 ° C.
  • a catheter tip 195 is also arranged in a conventional manner.
  • Fig. 1c and 2d shown intermediates are subjected to a forming process.
  • heat shrink tubing 40, 140 from the Fig. 1c and 2d For example, blown with hot air. It is important that the reshaped plastic tubes are heated sufficiently so that at least a melting of the plastic tube occurs.
  • the required process parameters such as temperature and duration of blowing depend on the one hand on the material of the plastic tubes used and on the other hand on the hot air source used.
  • Optimal process parameters can, for. B. can be determined in a simple manner in the context of testing.
  • a polyimide tube unstructured on the outside can also be used without flanges.
  • an adhesive connection between plastic tube and polyimide tube is essentially formed.
  • a polyimide tube which has an external thread and / or grooves or the use of a tube made of a different material, which has a high strength and dimensional stability even at higher temperatures.
  • a tube for example made of a plastic, which is reinforced with a wire helix and / or fiber materials.
  • tubular connecting piece or the polyimide tube 50 and / or the helical spring 250 have regions with different inner and / or outer diameters.
  • plastic tubes with different inside and / or outside diameters are to be connected to one another by the method according to the invention.
  • illustrated methods can also be carried out without an inner tube 30.
  • the inner diameter of the Polyimidrschreibchens 50 may be less or greater than the inner diameter of the plastic tube in this case.
  • the coil spring 250 can be made Fig. 3 have a smaller or larger inner diameter than the plastic tubes.
  • the cylindrical wire piece 180 from Fig. 2a may also have a differently shaped transition region, which z. B. is formed substantially step-like. Also conceivable is the use of a cylindrical piece of wire whose end portion is completely conical.
  • imaged medical catheters 102 it is also possible for imaged medical catheters 102 to have more than two interconnected plastic tubes. Instead of or in addition to the arrangement 101, the medical catheter 102 z. As well as other compounds contained between plastic tubes. This can z. B. by in the Fig. 1a - 1d and in the Fig. 2a - 2e Illustrated method can be produced. In particular, in the area of the tip while the connection of the plastic tube by a coil spring, such. In Fig. 3 shown, advantageous because this type is characterized in particular by a high bending flexibility.
  • balloons which z. B. may be present as tubular plastic elements to attach to a catheter shaft.
  • the method according to the invention is also suitable for the production of balloon catheters.

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  • Pulmonology (AREA)
  • Biomedical Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Dermatology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Materials Engineering (AREA)
  • Biophysics (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Claims (21)

  1. Procédé d'assemblage coaxial d'un premier tube capillaire en matière plastique (10, 110) avec un deuxième tube capillaire en matière plastique (20, 120), lesdits tubes capillaires en matière plastique (10, 20) étant notamment conçus comme des éléments constitutifs d'un cathéter médical (102), les deux tubes capillaires en matière plastique (10, 20) étant reliés par le biais d'une pièce d'assemblage (50) tubulaire, caractérisé en ce que le premier tube capillaire en matière plastique (10, 110) et le deuxième tube capillaire en matière plastique (20, 120), au cours d'un processus de façonnage, sont surmoulés depuis l'extérieur contre la pièce d'assemblage (50) tubulaire dont la paroi est renforcée avec un filament métallique spiralé, de sorte qu'un assemblage adhésif ou par complémentarité de formes est formé.
  2. Procédé selon la revendication 1, caractérisé en ce que le premier tube capillaire en matière plastique (10) et/ou le deuxième tube capillaire en matière plastique (20) est ramolli par un traitement thermique durant le processus de façonnage puis surmoulé contre la pièce d'assemblage (50) tubulaire par une force de pressage agissant dans une direction radiale.
  3. Procédé selon l'une des revendications 1 à 2, caractérisé en ce qu'avant le processus de façonnage, une zone d'extrémité (11) du premier tube capillaire en matière plastique (10) est glissée de manière coaxiale sur une première extrémité (51) de la pièce d'assemblage (50) tubulaire et une zone d'extrémité (21) du deuxième tube capillaire en matière plastique (20) est glissée de manière coaxiale sur une deuxième extrémité (52) de la pièce d'assemblage (50) tubulaire.
  4. Procédé selon la revendication 3, caractérisé en ce que la zone d'extrémité (11) du premier tube capillaire en matière plastique (10) est en plus glissée de manière coaxiale sur la zone d'extrémité (21) du deuxième tube capillaire en matière plastique (20) avant le processus de façonnage.
  5. Procédé selon l'une des revendications 1 à 2, caractérisé en ce qu'avant le processus de façonnage, la zone d'extrémité (111) du premier tube capillaire en matière plastique (110) est façonnée en un manchon d'assemblage (111.1), le manchon d'assemblage (111.1) étant conçu sous la forme d'une pièce d'assemblage tubulaire.
  6. Procédé selon la revendication 5, caractérisé en ce qu'un diamètre extérieur du manchon d'assemblage (111.1), comparé à un diamètre extérieur du premier tube capillaire en matière plastique (110), est réalisé nettement rétrécit.
  7. Procédé selon l'une des revendications 5 à 6, caractérisé en ce que pour la fabrication du manchon d'assemblage (111.1), une portion d'extrémité (181) d'un fil métallique cylindrique (180) est introduite dans la zone d'extrémité (111) du premier tube capillaire en matière plastique (110) et ensuite la zone d'extrémité (111) du premier tube capillaire en matière plastique (110) est surmoulée contre la portion d'extrémité (181) du fil métallique cylindrique (180) par façonnage depuis l'extérieur, le diamètre extérieur (181.1) de la portion d'extrémité (181) du fil métallique cylindrique (180) mesurant notamment de 60 à 80 %, notamment de préférence de 65 à 75 % du diamètre intérieur (113) du premier tube capillaire en matière plastique (110) avant la formation du manchon d'assemblage (111.1).
  8. Procédé selon l'une des revendications 5 à 7, caractérisé en ce qu'avant le processus de façonnage, le deuxième tube capillaire en matière plastique (120) est glissé de manière coaxiale sur le manchon d'assemblage (111.1) et au moins sur une longueur totale de celui-ci.
  9. Procédé selon l'une des revendications 5 à 8, caractérisé en ce que l'extrémité libre (111.2) du manchon d'assemblage (111.2) est élargie avant le processus de façonnage.
  10. Procédé selon la revendication 9, caractérisé en ce que pour l'élargissement de l'extrémité libre (111.2) du manchon d'assemblage (111.1), une zone épaissie (183) rattachée à la portion d'extrémité (181) du fil métallique cylindrique (180) et/ou une zone de transition (182) élargie vers la zone épaissie (183) du fil métallique cylindrique (180) est glissée à l'intérieur dans l'extrémité libre (111.2) du manchon d'assemblage (111.1) dans une direction vers le premier tube capillaire en matière plastique (110), un diamètre extérieur de la zone épaissie (183) du fil métallique cylindrique (180) correspondant pour l'essentiel au diamètre intérieur (113) du premier tube capillaire en matière plastique (110) avant la fabrication du manchon d'assemblage (111.1).
  11. Procédé selon l'une des revendications 9 à 10, caractérisé en ce que pendant le processus de façonnage, le deuxième tube capillaire en matière plastique (120) est surmoulé contre le manchon d'assemblage (111.1) élargi du côté de l'extrémité en formant un assemblage par complémentarité de formes.
  12. Procédé selon l'une des revendications 10 à 11, caractérisé en ce que pendant le processus de façonnage, la portion d'extrémité (181) d'un fil métallique cylindrique (180) demeure dans le manchon d'assemblage (111.1) et la zone de transition (182) élargie et/ou la zone épaissie (183) du fil métallique cylindrique (180) dans l'extrémité libre (111.2) élargie du manchon d'assemblage (111.2).
  13. Procédé selon l'une des revendications 1 à 12, caractérisé en ce que le premier tube capillaire en matière plastique (110) et/ou le deuxième tube capillaire en matière plastique (120) sont enroulés en forme de spirale après le processus de façonnage et une spirale indéformable est façonnée en utilisant de la chaleur.
  14. Arrangement (1) comprenant un premier tube capillaire en matière plastique (10, 110), lequel est assemblé avec un deuxième tube capillaire en matière plastique (10, 110) par le biais d'une pièce d'assemblage (50) tubulaire, notamment fabrique par un procédé selon l'une des revendications 1 à 13, le premier tube capillaire en matière plastique (10, 110) et le deuxième tube capillaire en matière plastique (20, 120) étant surmoulés depuis l'extérieur contre la pièce d'assemblage (50) tubulaire et étant assemblé avec la pièce d'assemblage (50) tubulaire de manière adhésive ou par complémentarité de formes, caractérisé en ce qu'une paroi de la pièce d'assemblage (50) est renforcée avec un filament métallique spiralé enrobé.
  15. Arrangement selon la revendication 14, caractérisé en ce que le premier tube capillaire en matière plastique (10, 110) se compose d'un premier matériau thermoplastique, notamment de polytéréphtalate d'éthylène, et en ce que le deuxième tube capillaire en matière plastique (20, 120) se compose d'un deuxième matériau thermoplastique, notamment de nylon.
  16. Arrangement selon l'une des revendications 14 à 15, caractérisé en ce qu'un module d'élasticité du premier tube capillaire en matière plastique (10, 110) est supérieur à un module d'élasticité du deuxième tube capillaire en matière plastique (20, 120).
  17. Arrangement selon la revendication 16, caractérisé en ce qu'un module d'élasticité de la pièce d'assemblage (50) tubulaire est supérieur au module d'élasticité du premier tube capillaire en matière plastique (10, 110) et supérieur au module d'élasticité du deuxième tube capillaire en matière plastique (20, 120) et notamment en ce que la pièce d'assemblage (50) tubulaire se compose de polyimide.
  18. Arrangement selon l'une des revendications 14 à 17, caractérisé en ce que la pièce d'assemblage (50) tubulaire possède une enveloppe extérieure structurée et en ce que l'enveloppe extérieure structurée comporte notamment des parties saillantes et/ou des cannelures et/ou un filetage et/ou une bride périphérique (51.1, 51.2).
  19. Arrangement selon l'une des revendications 14 à 18, caractérisé en ce que le premier tube capillaire en matière plastique (110) et/ou le deuxième tube capillaire en matière plastique (120) se présentent sous la forme d'une spirale indéformable.
  20. Cathéter (102) à usage médical, comprenant un arrangement selon l'une des revendications 14 à 19.
  21. Utilisation d'un procédé selon l'une des revendications 1 à 13 pour la fabrication d'un cathéter (102) .
EP15184840.5A 2008-07-16 2009-07-08 Procédé de raccordement de petits tubes métalliques Active EP2988049B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH01106/08A CH699220A1 (de) 2008-07-16 2008-07-16 Verfahren zum Verbinden von Kunststoffröhrchen.
EP09797338.2A EP2329180B1 (fr) 2008-07-16 2009-07-08 Procédé d'assemblage de petits tubes en matière plastique
PCT/CH2009/000242 WO2010006456A1 (fr) 2008-07-16 2009-07-08 Procédé d'assemblage de petits tubes en matière plastique

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP09797338.2A Division EP2329180B1 (fr) 2008-07-16 2009-07-08 Procédé d'assemblage de petits tubes en matière plastique
EP09797338.2A Division-Into EP2329180B1 (fr) 2008-07-16 2009-07-08 Procédé d'assemblage de petits tubes en matière plastique

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EP2988049A1 EP2988049A1 (fr) 2016-02-24
EP2988049B1 true EP2988049B1 (fr) 2019-04-24

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EP15184840.5A Active EP2988049B1 (fr) 2008-07-16 2009-07-08 Procédé de raccordement de petits tubes métalliques
EP09797338.2A Active EP2329180B1 (fr) 2008-07-16 2009-07-08 Procédé d'assemblage de petits tubes en matière plastique

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EP09797338.2A Active EP2329180B1 (fr) 2008-07-16 2009-07-08 Procédé d'assemblage de petits tubes en matière plastique

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US (1) US9625069B2 (fr)
EP (2) EP2988049B1 (fr)
JP (1) JP5603332B2 (fr)
CA (1) CA2730330C (fr)
CH (1) CH699220A1 (fr)
WO (1) WO2010006456A1 (fr)

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Publication number Publication date
JP5603332B2 (ja) 2014-10-08
CH699220A1 (de) 2010-01-29
US9625069B2 (en) 2017-04-18
CA2730330C (fr) 2016-09-20
EP2329180B1 (fr) 2015-10-28
EP2329180A1 (fr) 2011-06-08
WO2010006456A1 (fr) 2010-01-21
EP2988049A1 (fr) 2016-02-24
JP2011528091A (ja) 2011-11-10
CA2730330A1 (fr) 2010-01-21
US20110125134A1 (en) 2011-05-26

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